Has human brain intelligence been growing and evolving for thousands of years?

From1.5000 to1.5000 in recent years, human brain capacity has shrunk by 3%~4% compared with our body. However, brain volume does not represent the level of intelligence. The further evolution of our brain may be reflected in the full utilization and proportion optimization of white matter and gray matter. Some genetic studies also support this view, and the distribution and utilization rate of neurons in our brain is much higher than that of the ancients.

However, some people think that human brain atrophy is a sign of a slight decline in human general mental ability. Once a complex society is formed, people who are not so smart will depend on their smarter peers for survival. This brain degeneration will continue. 20 10

1998 A study shows that if the influence of immigration is excluded, the IQ of every generation in the United States will drop by about 0.81q.

Value. However, environmental factors and natural factors show that even if this genetic influence is true, it has already been compensated by advanced medical care and education, which has brought about a steady increase in human IQ in 2 1 century.